window.onload = popunder;


function popunder() {

    isCookie = checkCookie();
    if (isCookie == true) {
        eraseCookie("wizit_pop");
        setCookie("wizit_pop", "1", 3);
    }
    else {
        document.getElementById('overlay').style.display = 'block';
        document.getElementById('dvBody').style.display = 'block';
        setCookie("wizit_pop", "1", 3);
    }
}
function eraseCookie(name) {
    setCookie(name, "", -1);
}
function checkCookie(){
    value = getCookie("wizit_pop");
    
if (value!=null && value!=""){
      return true;
  }
else{
      return false;
  }
}
function getCookie(c_name) {
    if (document.cookie.length > 0) {
        c_start = document.cookie.indexOf(c_name + "=");
        if (c_start != -1) {
            c_start = c_start + c_name.length + 1;
            c_end = document.cookie.indexOf(";", c_start);
            if (c_end == -1) c_end = document.cookie.length;
            return unescape(document.cookie.substring(c_start, c_end));
        }
    }
    return "";
}
function setCookie(c_name, value, expiredays) {
    var exdate = new Date();
    exdate.setDate(exdate.getDate() + expiredays);
    document.cookie = c_name + "=" + escape(value) +
((expiredays == null) ? "" : ";expires=" + exdate.toGMTString()) + ";path=/";
}
function close() {
    document.getElementById('overlay').style.display = 'none';
    document.getElementById('dvBody').style.display = 'none';
}